ceph tell osd.* injectargs '--osd_recovery_max_active 20'          

ceph tell osd.* injectargs '--osd_recovery_max_single_start 10'
    
#ceph tell osd.* injectargs '--osd_recovery_max_chunk 1048576'
ceph tell osd.* injectargs '--osd_recovery_max_chunk 4194304'
ceph tell osd.* injectargs '--osd_backfill_scan_min 1'
ceph tell osd.* injectargs '--osd_backfill_scan_max 100'
